INFO: task syz-executor027:6715 blocked for more than 143 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor027 state:D stack:27256 pid: 6715 ppid: 6578 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 request_wait_answer+0x4a4/0x850 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xcd0 fs/fuse/dev.c:515 fuse_access+0x1ea/0x340 fs/fuse/dir.c:1179 fuse_permission+0x54a/0x640 fs/fuse/dir.c:1258 do_inode_permission fs/namei.c:457 [inline] inode_permission.part.0+0x236/0x440 fs/namei.c:524 inode_permission+0x3c/0x140 fs/namei.c:477 path_permission include/linux/fs.h:2988 [inline] __do_sys_chdir fs/open.c:493 [inline] __se_sys_chdir fs/open.c:483 [inline] __x64_sys_chdir+0x117/0x260 fs/open.c:483 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f25706d09f9 RSP: 002b:00007f2570678208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f2570769028 RCX: 00007f25706d09f9 RDX: 00007f25706d09f9 RSI: 94c54783926a4f33 RDI: 00000000200020c0 RBP: 00007f2570769020 R08: 0000000000000000 R09: 00007f2570769028 R10: 00007f2570769028 R11: 0000000000000246 R12: 00007f257076902c R13: 00007f2570878cdf R14: 00007f2570678300 R15: 0000000000022000 INFO: task syz-executor027:6718 blocked for more than 143 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor027 state:D stack:27824 pid: 6718 ppid: 6575 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 request_wait_answer+0x4a4/0x850 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xcd0 fs/fuse/dev.c:515 fuse_access+0x1ea/0x340 fs/fuse/dir.c:1179 fuse_permission+0x54a/0x640 fs/fuse/dir.c:1258 do_inode_permission fs/namei.c:457 [inline] inode_permission.part.0+0x236/0x440 fs/namei.c:524 inode_permission+0x3c/0x140 fs/namei.c:477 path_permission include/linux/fs.h:2988 [inline] __do_sys_chdir fs/open.c:493 [inline] __se_sys_chdir fs/open.c:483 [inline] __x64_sys_chdir+0x117/0x260 fs/open.c:483 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f25706d09f9 RSP: 002b:00007f2570678208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f2570769028 RCX: 00007f25706d09f9 RDX: 00007f25706d09f9 RSI: 94c54783926a4f33 RDI: 00000000200020c0 RBP: 00007f2570769020 R08: 0000000000000000 R09: 00007f2570769028 R10: 00007f2570769028 R11: 0000000000000246 R12: 00007f257076902c R13: 00007f2570878cdf R14: 00007f2570678300 R15: 0000000000022000 INFO: task syz-executor027:6720 blocked for more than 143 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor027 state:D stack:27552 pid: 6720 ppid: 6580 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 request_wait_answer+0x4a4/0x850 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xcd0 fs/fuse/dev.c:515 fuse_access+0x1ea/0x340 fs/fuse/dir.c:1179 fuse_permission+0x54a/0x640 fs/fuse/dir.c:1258 do_inode_permission fs/namei.c:457 [inline] inode_permission.part.0+0x236/0x440 fs/namei.c:524 inode_permission+0x3c/0x140 fs/namei.c:477 path_permission include/linux/fs.h:2988 [inline] __do_sys_chdir fs/open.c:493 [inline] __se_sys_chdir fs/open.c:483 [inline] __x64_sys_chdir+0x117/0x260 fs/open.c:483 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f25706d09f9 RSP: 002b:00007f2570678208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f2570769028 RCX: 00007f25706d09f9 RDX: 00007f25706d09f9 RSI: 94c54783926a4f33 RDI: 00000000200020c0 RBP: 00007f2570769020 R08: 0000000000000000 R09: 00007f2570769028 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f257076902c R13: 00007f2570878cdf R14: 00007f2570678300 R15: 0000000000022000 INFO: task syz-executor027:6730 blocked for more than 144 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor027 state:D stack:27552 pid: 6730 ppid: 6576 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 request_wait_answer+0x4a4/0x850 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xcd0 fs/fuse/dev.c:515 fuse_access+0x1ea/0x340 fs/fuse/dir.c:1179 fuse_permission+0x54a/0x640 fs/fuse/dir.c:1258 do_inode_permission fs/namei.c:457 [inline] inode_permission.part.0+0x236/0x440 fs/namei.c:524 inode_permission+0x3c/0x140 fs/namei.c:477 path_permission include/linux/fs.h:2988 [inline] __do_sys_chdir fs/open.c:493 [inline] __se_sys_chdir fs/open.c:483 [inline] __x64_sys_chdir+0x117/0x260 fs/open.c:483 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f25706d09f9 RSP: 002b:00007f2570678208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f2570769028 RCX: 00007f25706d09f9 RDX: 00007f25706d09f9 RSI: 94c54783926a4f33 RDI: 00000000200020c0 RBP: 00007f2570769020 R08: 0000000000000000 R09: 00007f2570769028 R10: 00007f2570769028 R11: 0000000000000246 R12: 00007f257076902c R13: 00007f2570878cdf R14: 00007f2570678300 R15: 0000000000022000 INFO: task syz-executor027:6740 blocked for more than 144 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor027 state:D stack:27192 pid: 6740 ppid: 6579 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 request_wait_answer+0x4a4/0x850 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xcd0 fs/fuse/dev.c:515 fuse_access+0x1ea/0x340 fs/fuse/dir.c:1179 fuse_permission+0x54a/0x640 fs/fuse/dir.c:1258 do_inode_permission fs/namei.c:457 [inline] inode_permission.part.0+0x236/0x440 fs/namei.c:524 inode_permission+0x3c/0x140 fs/namei.c:477 path_permission include/linux/fs.h:2988 [inline] __do_sys_chdir fs/open.c:493 [inline] __se_sys_chdir fs/open.c:483 [inline] __x64_sys_chdir+0x117/0x260 fs/open.c:483 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f25706d09f9 RSP: 002b:00007f2570678208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f2570769028 RCX: 00007f25706d09f9 RDX: 00007f25706d09f9 RSI: 94c54783926a4f33 RDI: 00000000200020c0 RBP: 00007f2570769020 R08: 0000000000000000 R09: 00007f2570769028 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f257076902c R13: 00007f2570878cdf R14: 00007f2570678300 R15: 0000000000022000 INFO: task syz-executor027:6763 blocked for more than 144 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor027 state:D stack:27544 pid: 6763 ppid: 6578 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 request_wait_answer+0x4a4/0x850 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xcd0 fs/fuse/dev.c:515 fuse_access+0x1ea/0x340 fs/fuse/dir.c:1179 fuse_permission+0x54a/0x640 fs/fuse/dir.c:1258 do_inode_permission fs/namei.c:457 [inline] inode_permission.part.0+0x236/0x440 fs/namei.c:524 inode_permission+0x3c/0x140 fs/namei.c:477 path_permission include/linux/fs.h:2988 [inline] __do_sys_chdir fs/open.c:493 [inline] __se_sys_chdir fs/open.c:483 [inline] __x64_sys_chdir+0x117/0x260 fs/open.c:483 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f25706d09f9 RSP: 002b:00007f2570678208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f2570769028 RCX: 00007f25706d09f9 RDX: 00007f25706d09f9 RSI: 94c54783926a4f33 RDI: 00000000200020c0 RBP: 00007f2570769020 R08: 0000000000000000 R09: 00007f2570769028 R10: 00007f2570769028 R11: 0000000000000246 R12: 00007f257076902c R13: 00007f2570878cdf R14: 00007f2570678300 R15: 0000000000022000 INFO: task syz-executor027:6769 blocked for more than 144 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor027 state:D stack:27648 pid: 6769 ppid: 6580 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 request_wait_answer+0x4a4/0x850 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xcd0 fs/fuse/dev.c:515 fuse_access+0x1ea/0x340 fs/fuse/dir.c:1179 fuse_permission+0x54a/0x640 fs/fuse/dir.c:1258 do_inode_permission fs/namei.c:457 [inline] inode_permission.part.0+0x236/0x440 fs/namei.c:524 inode_permission+0x3c/0x140 fs/namei.c:477 path_permission include/linux/fs.h:2988 [inline] __do_sys_chdir fs/open.c:493 [inline] __se_sys_chdir fs/open.c:483 [inline] __x64_sys_chdir+0x117/0x260 fs/open.c:483 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f25706d09f9 RSP: 002b:00007f2570678208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f2570769028 RCX: 00007f25706d09f9 RDX: 00007f25706d09f9 RSI: 94c54783926a4f33 RDI: 00000000200020c0 RBP: 00007f2570769020 R08: 0000000000000000 R09: 00007f2570769028 R10: 00007f2570769028 R11: 0000000000000246 R12: 00007f257076902c R13: 00007f2570878cdf R14: 00007f2570678300 R15: 0000000000022000 INFO: task syz-executor027:6772 blocked for more than 145 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor027 state:D stack:27752 pid: 6772 ppid: 6575 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 request_wait_answer+0x4a4/0x850 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xcd0 fs/fuse/dev.c:515 fuse_access+0x1ea/0x340 fs/fuse/dir.c:1179 fuse_permission+0x54a/0x640 fs/fuse/dir.c:1258 do_inode_permission fs/namei.c:457 [inline] inode_permission.part.0+0x236/0x440 fs/namei.c:524 inode_permission+0x3c/0x140 fs/namei.c:477 path_permission include/linux/fs.h:2988 [inline] __do_sys_chdir fs/open.c:493 [inline] __se_sys_chdir fs/open.c:483 [inline] __x64_sys_chdir+0x117/0x260 fs/open.c:483 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f25706d09f9 RSP: 002b:00007f2570678208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f2570769028 RCX: 00007f25706d09f9 RDX: 00007f25706d09f9 RSI: 94c54783926a4f33 RDI: 00000000200020c0 RBP: 00007f2570769020 R08: 0000000000000000 R09: 00007f2570769028 R10: 00007f2570769028 R11: 0000000000000246 R12: 00007f257076902c R13: 00007f2570878cdf R14: 00007f2570678300 R15: 0000000000022000 INFO: task syz-executor027:6778 blocked for more than 145 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor027 state:D stack:27544 pid: 6778 ppid: 6576 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 request_wait_answer+0x4a4/0x850 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xcd0 fs/fuse/dev.c:515 fuse_access+0x1ea/0x340 fs/fuse/dir.c:1179 fuse_permission+0x54a/0x640 fs/fuse/dir.c:1258 do_inode_permission fs/namei.c:457 [inline] inode_permission.part.0+0x236/0x440 fs/namei.c:524 inode_permission+0x3c/0x140 fs/namei.c:477 path_permission include/linux/fs.h:2988 [inline] __do_sys_chdir fs/open.c:493 [inline] __se_sys_chdir fs/open.c:483 [inline] __x64_sys_chdir+0x117/0x260 fs/open.c:483 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f25706d09f9 RSP: 002b:00007f2570678208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f2570769028 RCX: 00007f25706d09f9 RDX: 00007f25706d09f9 RSI: 94c54783926a4f33 RDI: 00000000200020c0 RBP: 00007f2570769020 R08: 0000000000000000 R09: 00007f2570769028 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f257076902c R13: 00007f2570878cdf R14: 00007f2570678300 R15: 0000000000022000 INFO: task syz-executor027:6783 blocked for more than 145 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor027 state:D stack:27200 pid: 6783 ppid: 6579 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 request_wait_answer+0x4a4/0x850 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xcd0 fs/fuse/dev.c:515 fuse_access+0x1ea/0x340 fs/fuse/dir.c:1179 fuse_permission+0x54a/0x640 fs/fuse/dir.c:1258 do_inode_permission fs/namei.c:457 [inline] inode_permission.part.0+0x236/0x440 fs/namei.c:524 inode_permission+0x3c/0x140 fs/namei.c:477 path_permission include/linux/fs.h:2988 [inline] __do_sys_chdir fs/open.c:493 [inline] __se_sys_chdir fs/open.c:483 [inline] __x64_sys_chdir+0x117/0x260 fs/open.c:483 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f25706d09f9 RSP: 002b:00007f2570678208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f2570769028 RCX: 00007f25706d09f9 RDX: 00007f25706d09f9 RSI: 94c54783926a4f33 RDI: 00000000200020c0 RBP: 00007f2570769020 R08: 0000000000000000 R09: 00007f2570769028 R10: 00007f2570769028 R11: 0000000000000246 R12: 00007f257076902c R13: 00007f2570878cdf R14: 00007f2570678300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8b97fe20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/6436: #0: ffff88801d06aaf0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 2 locks held by kworker/u4:7/6738: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 6577 Comm: syz-executor027 Not tainted 5.15.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_kcov_mode+0x7/0x40 kernel/kcov.c:163 Code: 00 e9 59 fe ff ff 48 8b 7c 24 08 e8 c3 5d 47 00 e9 61 fd ff ff cc cc cc cc cc cc cc cc cc cc cc cc cc cc 65 8b 05 c9 f9 8b 7e <89> c2 81 e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b RSP: 0018:ffffc90002bffb50 EFLAGS: 00000246 RAX: 0000000080000001 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff888026239c80 RDI: 0000000000000003 RBP: ffffc90002bffd1c R08: 0000000000000000 R09: ffffffff8b60a083 R10: ffffffff81459780 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000040000005 R14: 0000000040000000 R15: ffff888024f23900 FS: 0000555555c43400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffacf82c018 CR3: 000000006ff23000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: write_comp_data kernel/kcov.c:218 [inline] __sanitizer_cov_trace_const_cmp4+0x1c/0x70 kernel/kcov.c:284 wait_task_stopped kernel/exit.c:1167 [inline] wait_consider_task+0x430/0x3b80 kernel/exit.c:1371 do_wait_thread kernel/exit.c:1397 [inline] do_wait+0x6ca/0xce0 kernel/exit.c:1514 kernel_wait4+0x14c/0x260 kernel/exit.c:1677 __do_sys_wait4+0x13f/0x150 kernel/exit.c:1705 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f25706cf0a6 Code: 0f 1f 40 00 31 c9 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 49 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 11 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 90 48 83 ec 28 89 54 24 14 48 89 74 24 RSP: 002b:00007f2570878d58 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 00000000001da048 RCX: 00007f25706cf0a6 RDX: 0000000040000001 RSI: 00007f2570878d84 RDI: 00000000ffffffff RBP: 000000000000615d R08: 0000000000000795 R09: 00007fffb6dd1080 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2570878d84 R13: 00007f2570878de0 R14: 00000000000007b7 R15: 431bde82d7b634db ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e9 59 fe ff ff jmpq 0xfffffe5e 5: 48 8b 7c 24 08 mov 0x8(%rsp),%rdi a: e8 c3 5d 47 00 callq 0x475dd2 f: e9 61 fd ff ff jmpq 0xfffffd75 14: cc int3 15: cc int3 16: cc int3 17: cc int3 18: cc int3 19: cc int3 1a: cc int3 1b: cc int3 1c: cc int3 1d: cc int3 1e: cc int3 1f: cc int3 20: cc int3 21: cc int3 22: 65 8b 05 c9 f9 8b 7e mov %gs:0x7e8bf9c9(%rip),%eax # 0x7e8bf9f2 * 29: 89 c2 mov %eax,%edx <-- trapping instruction 2b: 81 e2 00 01 00 00 and $0x100,%edx 31: a9 00 01 ff 00 test $0xff0100,%eax 36: 74 10 je 0x48 38: 31 c0 xor %eax,%eax 3a: 85 d2 test %edx,%edx 3c: 74 15 je 0x53 3e: 8b .byte 0x8b